Just curious.... If I went to the Drag strip and was brave enough(stupid enough?) to dump my clutch at 6K in a 2nd gear start and posted a better time than I have.... would I have to disclose it was a 3 shift run?Would I have a question mark near my time? Heck, one less shift is .4-.5 tenths reduction. The point I am trying to make is these times are for reference only- legislating all the variables would be difficult if not impossible. Should we all buy sequential boxes like Jean- he has a substantial advantage shifting over us mortals with stock transmissions. Lowest time should stand. Like Jean said, a graph will show every shift anyway... you cannot hide that fact. Just my thoughts, but I will defer to Jean, Kevin

 

I guess this pretty much covers it.

 

Hey guys, not trying to set rules on anyone. I am only listing the differences and my perspective. It (shifts) just needs to be disclosed for transparency purposes and in any case no time should be posted without the moderator having checked/seen the numbers, graph or file. It already sounds like a pain and we have not started posting times!

 

Alright...so to clarify:

-Drivers will start the acceleration runs anywhere from 0-45 mph, to ensure everyone has attained full boost before they hit 60 mph (earlier the better for the guys with big turbos).

-Only fastest times will be posted. Not # of shifts.

-All graphs will be reviewed, as well as posted...so that everyone can see what was happening during the run. If people want to break down the amount of shifts from the posted graphs for discussion purposes, that's fine. But the list will stand as fastest to slowest....regardless of shifts.

Easy!

 

I'd like to see some standardized measurment of lag and low end torque.

 

An extrapolation from 1/8th mile and 1/4 mile Trap Speeds will give you a very good idea how much a lag a car has.

I can verify HP from Trap Speed and weight....but I'm not sure how to measure torque other on a dyno.

 

Are we going with a 0 to 100 mph list too?

 

Short distances like that are mostly dependent on launch, and since it only show's E.T./Elapsed Time (since 100 mph is always the Trap Speed), I don't think it is much of a benefit.

Also...due to the increased distance, I think the 1/4 mile is a much better measurement of E.T. than 0-100 is (for cars like ours that can go well over 100 mph in the 1/4 mile, that is).

 

Scott,

When you reach the 1/8th you are most likely at the end of third gear on a stock 996TT gearing and RPM. Then when you change to 4th gear (from redline) your RPM drops to about 5500RPMs in 4th and then to about 5800RPMs when you shift to 5th to go through traps. I therefore think that lag will not be there at all since you will be on almost full boost everytime you shift. Does it make sense? That is why I don't think lag has much to do with the quartermile, except in 1st-2nd gear where you drop to about 3900RPMs and therefore you might encounter some limited lag, but I would think almost none. The larger turbos you have the faster you will do the quartermile it seems. Lag will be there when the car is under load starting in third gear for example at 2k RPMS or a 60-130mph run if you start in third.

As far as measuring real torque on the ground, with a datalogger you can see precisely the long Gs under which your car is accelerating, from that data you can work backwards to get to thrust, then torque at the wheels, and finally through the gear ratios, to the real engine torque dyno. It is not for the faint of heart but can be done with some work.

 

I have doine this chart that shows the gearing for a 996TT with the RPM drops (sorry it is in KPH), maybe this will make more sense. The thick redline is where the RPs will drop between gears. 1/8th would be somewhere close to redline in 3rd. on a rather fast 996.

 

Exactly, but the way i first did it i originally thought shows your cars TRUE performance, guess not

Started using the driftbox today in my G35 just messing around with it trying to learn it, its extremely confusing, especially since i live in Dix Hills/Huntingon NY, hardly any roads are FLAT besides major roads, where there is traffic, cops and so on. So bottom line is, this thing will have to be done late, late night! I have a spot in mine where its flat for miles, a parkway and usually no cars on it, cops scare me but i really want to test this thing with my car, i might just drive around today/tonight and see what spots are best, i was messing around and getting SO MAD because there was literally nowhere to use it. I got 2 0-60 times and one was 6.1 with me and friend in car other 18 seconds which was bogus, it bugged out!

 

Yea your right, but videos can certainly give a general idea, just not pinpoint, stay tuned!

 

Martin, if properly setup it doesnt "bug out".... If you thought you made it to 60 and stopped short of the 60mph it will just keep the timer running until you get to 60 again. Do not use the cars speedo. Everytime you stop... it will reset its 0-60.If I followed the my cars speedo my 60-130 runs would be 2 minutes becasue at 130 I was only going 125. Kevin

 

OHHHHHHH yea you could be right, i hit the brakes right at the 60mph, so that .x could have made the whole difference wow, its pretty accuarte though with a few things i tested.

Question though, for the 35-75, 50-100 or w/e tests, does it do this automatically if i just go all out in acceleration 1 mode, or do i have to click through the menu and set everything up like i had to check off the 1 foot rollout?

 

Martin it will log everything... there should be no check mark on 1 ft roll out.... that just simulates the rollout at the 1/4 mile. Kevin